Roller

This is a roller I made for pressing self-adhesive car bodywork panels down firmly to ensure the adhesive strips make full contact.

It could also be used for other applications, perhaps by making the roller itself from a thermoplastic filament such as TPE or Ninjaflex. I covered mine with adhesive-backed neoprene sheeting, with a layer of gaffer tape to make it more durable and to protect the seam.